Stroma is the fluid-filled space inside the chloroplasts of higher plants. It plays a crucial role in the light-independent reactions of photosynthesis, also known as the Calvin cycle. These reactions occur in the stroma and are responsible for the synthesis of glucose from carbon dioxide and water.

The stroma contains various components that are involved in the light-independent reactions, including enzymes and other necessary molecules. The correct answer to the given question is option 'D', which states that the stroma contains light-independent reaction enzymes.

Here is a detailed explanation of the answer:

1. Stroma:
- The stroma is a gel-like substance that fills the space between the thylakoid membranes in the chloroplasts.
- It contains enzymes, DNA, ribosomes, and other molecules necessary for the functioning of the chloroplasts.

2. Light-dependent reactions:
- The light-dependent reactions of photosynthesis occur in the thylakoid membranes, not in the stroma.
- These reactions involve the absorption of light energy by chlorophyll molecules, which is used to generate ATP (adenosine triphosphate) and NADPH (nicotinamide adenine dinucleotide phosphate).

3. Light-independent reactions:
- The light-independent reactions, also known as the Calvin cycle or the dark reactions, occur in the stroma.
- These reactions do not directly require light energy and are responsible for the conversion of carbon dioxide into glucose.
- The key enzyme involved in the Calvin cycle is RuBisCO (ribulose-1,5-bisphosphate carboxylase/oxygenase), which catalyzes the fixation of carbon dioxide.

4. Enzymes in the stroma:
- The stroma contains various enzymes required for the light-independent reactions.
- Apart from RuBisCO, other enzymes like phosphoenolpyruvate carboxylase, phosphoglycerate kinase, glyceraldehyde 3-phosphate dehydrogenase, and ribulose-5-phosphate kinase are also present in the stroma.
- These enzymes catalyze the different steps of the Calvin cycle, allowing the conversion of carbon dioxide into glucose.

In summary, the correct answer is option 'D' because the stroma in the chloroplasts of higher plants contains enzymes that are involved in the light-independent reactions of photosynthesis. These enzymes play a crucial role in the synthesis of glucose from carbon dioxide and water.